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NXP Semiconductors 74LV251PW,112
- Part No.:
- 74LV251PW,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LV251PW,112.pdf
- Description:
- IC MULTIPLEXER 1 X 8:1 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,096
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Product details
Overview
74LV251PW,112 from NXP Semiconductors (formerly Philips) is an 8-input CMOS multiplexer with true/complement 3-state outputs, operating from 1.0 V to 3.6 V supply, featuring 19 ns propagation delay (Sn to Y at VCC = 3.3 V), 3.5 pF input capacitance, and –40°C to +125°C industrial temperature range-used in digital logic routing, bus arbitration, and data path selection in embedded control systems.
For engineers reviewing the 74LV251PW,112 datasheet, 74LV251PW,112 pinout, 74LV251PW,112 application, or 74LV251PW,112 equivalent, key selection criteria include low-voltage operation down to 1.0 V, dual active-high/active-low outputs, OE-controlled 3-state expansion capability, TTL-level compatibility at VCC ≥ 2.7 V, and TSSOP-16 packaging for high-density PCB layouts.
Technical Context
The 74LV251PW,112 implements a single 8:1 multiplexer function using Si-gate CMOS technology, with three binary select inputs (S0–S2) decoding one of eight data inputs (I0–I7) to both Y (true) and Y (complement) outputs. Its 3-state output enable (OE, active LOW) allows cascading multiple devices on shared buses without external gating.
It is pin- and function-compatible with 74HC/HCT251 but optimized for lower supply voltages, supporting dynamic power calculation via CPD = 44 pF and exhibiting ground bounce < 0.8 V and VOH undershoot > 2 V at VCC = 3.3 V, critical for signal integrity in mixed-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.0 V to 3.6 V - enables direct interface with 1.2 V, 1.8 V, 2.5 V, and 3.3 V logic domains |
| tPHL/tPLH (Sn→Y) | 19 ns / 20 ns at VCC = 3.3 V - defines maximum clock/data rate for synchronous multiplexing |
| IO (max sink/source) | ±25 mA - supports driving standard TTL loads and moderate-capacitance PCB traces |
| VIH/VIL (VCC = 3.3 V) | 2.0 V / 0.8 V - ensures reliable recognition of TTL-level inputs without level shifters |
| CI | 3.5 pF - minimizes capacitive loading on upstream drivers and reduces switching noise |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive, industrial motor control, and outdoor equipment |
Pinout & Package
74LV251PW,112 is housed in a 16-pin TSSOP (Thin Shrink Small Outline Package), Type I, body width 4.4 mm, lead pitch 0.65 mm, JEDEC MO-153 compliant, suitable for automated SMT assembly and high-density routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–4, 12–15 | I0–I7 | Eight independent data inputs routed selectively to Y/Y outputs based on S0–S2 state |
| 5 | Y | True output - active HIGH when enabled; high-impedance (Z) when OE = HIGH |
| 6 | Y | Complement output - inverted logic of Y; also 3-state controlled by OE |
| 7 | OE | Active-LOW output enable - disables both Y and Y simultaneously into high-Z for bus sharing |
| 8 | GND | Reference ground for all internal logic and I/O; must be low-inductance connection |
| 9–11 | S0–S2 | Binary select address lines - determine which Ix drives Y/Y (000 = I0, 111 = I7) |
| 16 | VCC | Positive supply - powers internal logic and output buffers; requires local 100 nF decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Functional down to 1.0 V VCC - supports ultra-low-power battery-backed subsystems |
| True + complement outputs | Simultaneous Y and Y delivery eliminates need for external inverters in differential-sense circuits |
| 3-State expansion capability | Both outputs disabled together by OE - enables parallel stacking of multiple 74LV251PW,112 on same bus |
| TTL input level compatibility | Accepts 2.0 V VIH at VCC = 2.7–3.6 V - interoperates with legacy 5 V TTL without translators |
| Ground bounce control | VOLP < 0.8 V at VCC = 3.3 V - reduces noise coupling into adjacent analog or RF sections |
Applications
| Digital Bus Arbitration | Programmable Logic Data Routing |
|---|---|
Use Scenario: Selecting between eight sensor data streams before transmission over a shared UART or SPI bus. IC Role / Device Role / Timing Role: 8:1 data selector with synchronized 3-state disable to prevent bus contention during channel switching. Use Value: Eliminates need for discrete logic gates or microcontroller GPIO expansion; enables deterministic latency (≤20 ns) per channel switch. | Use Scenario: Configuring signal paths in FPGA/CPLD I/O banks where fixed-function routing lacks flexibility. IC Role / Device Role / Timing Role: Hardware-level multiplexer providing glitch-free data path reconfiguration under control of configuration registers. Use Value: Reduces FPGA resource usage and simplifies timing closure by offloading combinatorial routing to dedicated silicon. |
| Industrial PLC Input Multiplexing | Automotive Diagnostic Interface |
Use Scenario: Consolidating eight discrete digital inputs (e.g., limit switches, emergency stops) into a single microcontroller input pin. IC Role / Device Role / Timing Role: Industrial-grade signal aggregator with –40°C to +125°C operation and noise-immune 3-state isolation. Use Value: Lowers BOM count and PCB area vs. discrete solutions while maintaining functional safety margins. | Use Scenario: Supporting multiple OBD-II protocol variants (SAE J1850, ISO 9141, CAN) on a single diagnostic ECU port. IC Role / Device Role / Timing Role: Protocol-selective signal router directing test commands to appropriate transceiver based on vehicle ID handshake. Use Value: Enables single-hardware platform for multi-protocol diagnostics without software-based bit-banging delays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-input multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC251PW,118 | Higher drive strength (±24 mA @ VCC = 3.3 V), identical pinout and AC specs, but tighter VIH/VIL thresholds (1.7 V/0.7 V) | Better suited for 3.3 V-only systems with fast-edge sources; less tolerant of marginal TTL inputs | Select 74LVC251PW,118 when interfacing exclusively with 3.3 V CMOS and requiring marginally faster edge rates |
| SN74LV251APW | TI variant with identical electrical specs and pinout; differs only in marking, traceability, and qualification documentation | No functional difference - used interchangeably in automotive AEC-Q100-compliant designs where TI sourcing is mandated | Choose SN74LV251APW when supply chain policy requires TI-branded components or AEC-Q100 documentation |
Compared with 74LV251PW,112, the 74LVC251PW,118 offers improved drive capability but reduced input voltage margin, while the SN74LV251APW provides identical performance with alternate qualification pedigree-selection depends on system-level voltage tolerance, sourcing requirements, and compliance mandates.
Availability
74LV251PW,112 is available at Aetrix Electronics and suitable for industrial control panels, automotive diagnostic tools, programmable logic interfaces, and embedded sensor concentrators requiring stable component supply across extended temperature ranges.
Supply support for 74LV251PW,112 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Philips' semiconductor division.
The 74LV251PW,112 belongs to NXP's LV logic family, designed specifically for mixed-voltage digital systems requiring low-power, wide-supply-range, and robust noise immunity in harsh environments.
FAQ
What is the minimum supply voltage required for functional operation of the 74LV251PW,112?
The 74LV251PW,112 is guaranteed to function down to VCC = 1.0 V, with DC characteristics specified from VCC = 1.2 V. At 1.0 V, inputs interpreted as HIGH or LOW must be driven to GND or VCC respectively, and propagation delays increase significantly-designs requiring timing predictability should operate within the recommended 1.2 V to 3.6 V range.
Does the 74LV251PW,112 support TTL-level inputs at 3.3 V supply?
Yes, the 74LV251PW,112 accepts TTL input levels when VCC is between 2.7 V and 3.6 V: VIH = 2.0 V (min) and VIL = 0.8 V (max) meet standard TTL thresholds. This allows direct connection to legacy 5 V TTL outputs without level-shifting circuitry, provided fan-out and noise margins are verified.
How does the 3-state enable (OE) control both Y and Y outputs on the 74LV251PW,112?
The OE input is internally decoded to simultaneously disable both Y and Y outputs into high-impedance (Z) state when asserted HIGH. This dual-output disable ensures no contention occurs during bus sharing-both true and complement signals go high-Z together, preserving signal integrity in multi-device configurations.
What is the maximum output current rating for the 74LV251PW,112 at 3.3 V supply?
At VCC = 3.3 V, the 74LV251PW,112 delivers ±25 mA per output (Y or Y) under steady-state conditions. When sinking 6 mA, VOL is guaranteed ≤ 0.40 V; when sourcing 6 mA, VOH is guaranteed ≥ 2.40 V-enabling direct drive of standard TTL loads and moderate PCB trace capacitance.
Is the 74LV251PW,112 pin-compatible with older 74HC251 or 74HCT251 devices?
Yes, the 74LV251PW,112 is pin- and function-compatible with 74HC251 and 74HCT251, sharing identical pin configuration, truth table, and logic behavior. However, it operates at lower voltages (1.0–3.6 V vs. 2.0–6.0 V) and exhibits faster propagation delays at 3.3 V, making it a drop-in upgrade in most 3.3 V systems.
74LV251PW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LV
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Multiplexer
- Circuit:
- 1 x 8:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- 6mA, 6mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 1V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
74LV251PW,112 FAQ
1.How can I place an order for 74LV251PW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LV251PW,112 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 74LV251PW,112 reliable?
The price and inventory of 74LV251PW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LV251PW,112 is usually 5 days.
3.What payment methods are accepted for 74LV251PW,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LV251PW,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LV251PW,112?
74LV251PW,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LV251PW,112 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 74LV251PW,112?
For technical support, including 74LV251PW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LV251PW,112 requirements.
6.How does Aetrix verify that 74LV251PW,112 is sourced from the original manufacturer or authorized distributors?
All 74LV251PW,112 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74LV251PW,112 meets industry standards.
7.What is the process for return or replacement of 74LV251PW,112?
All 74LV251PW,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LV251PW,112, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 74LV251PW,112 part is unused and in its original packaging.
Return procedure for 74LV251PW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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